Sine-bar.



W-` WINTEPx SINE BAR. APPucAToN FILED FEB. 17. 1915.

1,169,900. Patented Feb.1,1916.

WILLIAM WINTER, OF WOONSOCKET, RIIODE ISLAND, ASSIGNOR TO THE TAFT-PEIRCE MANUFACTURING COMPANY, 0F WOONSOCKE'I', RHODE ISLAND, Av CORPORATION 0F RHODE ISLAND.

SINE-BAR.

Y Patented Feb. 1, 1916.

Application filed February 17, 1915. Serial No. 8,950.

To czZZ whom t may cof/warn Be it known that I, WILLIAM WINTER, a citizen of the United States, and a'resident of the city of IVoonsocket, in the county of Providence, State of Rhode Island, have invented new and useful Improvements in Sine-Bars, of which the following is a specification. j

This invention relates broadly to tools and more specically to 'improvements in sine bars for accurately determining the value of angles.

The principal object of this inventionis to provide a sine bar mounted in a predetermined relation with a predetermined surface. t i

Another object of this invention is to adjustably mount a sine bar in a definite relation with va predetermined surface, which surfaeecomprises one of the cooperating elements of the tool for measuring angles.

A still further and primary object of this invention is to mount a sine bar in such manner as to permit a vertical adjustment of the pivot of said bar relative'to a predetermined plane.

Another important object of this invention is to mount a sine bar upon a base providedwith' a surface constituting a surface plate in such manner that the sine bar may be used by cooperation with the surface plate, or the sine bar may be positioned in such manner as not to extend over the surface plate venabling the measuring bar lto be used in conjunction with the base4 to measure `angles wherein both the work and the base rest upon a surface plate independent of the tool itself.

A still "further object of this invention is to provide a sine bar in the nature of a universal tool wherein the base of the sine bar is provided on its upper surface with asurfaceplate and also with a. surface bar directly beneath thel sine bar,v withjthe'lpi'votal Vmounting ofthe sine bar constructed to be reversed to enable the sinebar'to be used without cooperation of the 'specified surface plate or surface bar on the vbase block.

Still other and further objects of this invention will in part be obvious and will inv part be lpointed out hereinafter in the specification by reference to the accompanying drawings wherein like characters arev used to represent like parts throughout the sev'q Figure 1 is a plan view showing the sine bar over the surface plate and surface bar. Fig. 2 is an end elevation of the device with the parts in the position shown in Fig. l. Fig. 3 is a side elevation of the device with the parts in the position shown in Fig. l.

Heretofore sine bars have been constructed with the axis of the sine bar fixedly mounted at a predetermined distance above the plane beneath the supporting block of the bar7 and the pivot mounting wasvsuch as not to permit vertical adjustment thereof. Also as sine bars have heretofore been constructed it has been necessary to use the tool in connection with a surface plate separate and independent from the tool. Such sine bars are not well adapted to fast and accurate work in connection with relatively small articles. There is also a possibility of error in such devices in that small particles may accidentally be interposed between the base and the separate surface plate.

The sine bar which will hereinafter be more specifically described by reference to the drawings` obviates some of the previously specified diflieulties by having its base provided on its upper surface with a certain portion thereof finished to constitute a surface plate, and to further facilitate rapidity of use and accuracy of measurement it is also provided with a longitudinal bar extending directly beneath the sine bar and having its upper surface formed to lie in a Plane parallel to the plane of the sur' face plate upon which it rests. F urthormore, to facilitate more universal use of the device the pivot bolt yis constructed to be vertically adjustable, thereby enabling the device to be used upon varticles of small dimension'as well as upon larger devices thus increasing the range of 'usefulness of the device.v In order to further increaseI the range of utilityv o'f the tool thepivot bolt is con- A structed to pass through a removable boss which coperates with parallel'surfaces of the supporting bracket in such manner that the boss may be positioned to maintain the sine ba-r over the surface plate and surface bar, or theparts may be adjuste'djto retain the pivot boss in position extendlng away from the surface plate andV surfacebar, therebypermitting the instrument to be used after the manner of an ordinary sine bar.

Referring now to the drawings, the spezcie embodiment of my invention as herein illustrated comprises a supporting block A' which includes a base member 1 provided on its upper portion with a plane surface formed to constitute a surface plate 23 and;Y preferably provided at one corner with a bracket 4 in which is formed a vertical slot.

5. This surface plate 2 may comprise a predetermined measuring surface from which; measurements to a movable, measuring` element, which will later be described, may be taken.` Thebracket 4is providedgwithxertical sides 6 and 7 Which respectively liein. parallel vertical plane surfaces. The side, of. the,l bracket adjacent the cornerof` the, basemember may` beoi'set asiaty 8 toenable the. supporting surface9 to be formed to., lie inthe plane of the end ofithebasemember, and at right anglesto the lower. surface; 10 ofy thebase member. In the. preferred. form of my Vdevicea surface .barB isfiitedlyv mounted on the. surface plate 1. with. the, upper. edge ofsaid barasat 11 lyingin. a, plane parallel to the surface plateplane The upper edge of the surfacefbar` forms` anaccurate surface extending directly be-` neath. the measuring. or sinebarCto facili; tate .the voperation ofl measurements of angles 1 by.l thisl saidbar, which willV now be. des scribed.

A pivot bosslQis adapted to bear againstr thesurface 6 of the bracket 4. and; is4 proy vided with anopening to constitute a bear.- ing for-v the through pivot bolt 14, which passesithrough the measuring or si nebarC.1

f A thumb screw or` clamp 15 .cooperatesV with;V lthe outer end of the-through boltf14-to maintainithe sinebar (lin-` various adjusted por. sitionsand also permits .thethroughboltff14,y the4 pivot bosst 12, and the sinefbarG, to-be-i adjusted and clamped at various verticalpositions through thelength oftheslot 5 tliebracket l4. As has previously .been Especi? fied, it will be noted, that. sincetliebracket 4 is-,providedwithv parallell vertical`l plane, ,sur-faces and/7 andalso with aT verticalf slot-1y 5, the vthumb clamp 15 .may be. removed-- from the end of' the throughV bolt.- 14, andiv the'through'bolt may., be with drajvn fronrrthe,f

vertical slot.y 5 vand-replaced thereinV with the.- pivot boss 12 bearingfagainst the.surffle-7,l

and extending, outwardly alwayffrom overthe surface plate 2 and Y support-ingA block Ag lVlieninthisl position thesine bar G may; beusedzin connection with a. separate, sur.. faceplate (notshovvn) on which theI lower surface, 10T ofA the supportingl block A` isadanted to Set. The through holt/,14 isapreff erablv-y provided with a small longitudinal; slot, for. example, 16, with Which-,aset screw 17" may coperatie tol allow axial; and longi-x tudinalfmovementy of the throughboltf-14%` relative-to the boss12 and t0'preventrela: tive, rotativel movement of these. parts.; While measuring buttons DlandyEl may. be conveniently located ata variousc4 places rela?.w

tive tothe measuring or sine bar C, in the preferred form of my invention one measuring button, for, eXample ,D5 comprises, a cylindrical headg formedj on, theA- end! ofv the through bolt 14 and locatedfinsuchmanner 70 that! the center of this button is Within the axis of the through bolt and also the intersection-of I the axes of the short. armE 18 on the long, arm4 19,l Preferably I also locate the measuring button E adjacent the outer end of the long arm with thespace between` thecenters of the buttons@ andA a lined predetermined distance; the vsaid distance being, preferably. a. multipleor factonoften units'of: linea-r measure. i Inl onder tofprovide; rigidity Vand strength1 variousk forms, and'` shapes of'. the, Websm'aybe.utilized` through out the base construction. Vhile.tvlaeylong; arm and the shortarm of.. thet sin@ -blIE-Hilly hare their.. respective e axes. intersectatf 'vari-V ous angles, I, prefer, that the said, ariesloe .arti ranged to intersect at right angles, and-I ,alson prefer, that,all,of;-the edgesof thesaid measuringE arms ,shall beplarallel to eitherthe axis o ffone4 tor. the axis. ofi-the other, arm, AThen` constructed as specified, the sine bar com; prises an. Lgshapedmember, vvtrherein the edges off the longen arm: are ParallelA teilw plane j oining; the a-(Xesc o f tllregmeasuring` but'- tons D andQE, While tlieedges.oftlieashprter 95 arm are. at rightT angles `tovthepl-ane -j outing-- the, axes offthesaidmeasuringbuttongj and the ends? off each. arm are reeaeetvelyf aaa. allel to the;ai\is;of-the-, opposite; armL B:yeuse ofthisstoolitis-olmious;thatupon` 10Q measuring distances between the lower partey of'the;measuring;b uttonsgaal-ipredetermined plane ySurfaces/f.fer example. either; an ingles pendent surface plate, orathe` sai-irzface.lc plate,

ont` the` supportingv block, and s ubtraating 19,5.

thereby@ aceite rately.- measuring the. sadf angle, 11.9

' Sinceftisfphvsicallvfnossialetavavrfvthei Specific elrlbadiment of: mv. 11.1,.selectionsi With-2... out departing from the spirit thereofD I deu sire that-the saecie @an'iS-tr.etiaaherea` dis- C1QSd= Shall he coinsridered.:L as*v` illustrativey and-not.- imY a.1imitinafsense..

Having;thusfdeserbed'any Iy desire teaclam is?.

1-.1..n,-.a. device ofi-the characteridescribedin` Combinatan'., a Supporting block.; liarinafl theaupper, surf-ace, thereof farmed; to ,consti tute. ai S11 rface plate., a i bracket;cionsttnting'f a nart;of=.sadfsupuortngbloclr,.said bracket', beingfpmvdedf wi th. ai vertical; Slot.. a pivot bess, a. Divot; beltmauntedz. in said, niviotf bossa a clamningfnuti carried' lava Said: pirata bola mnvable sine iban piuotallyff mounted` lmonsaidpirotbaltibetsveen,theheadzefisaid bolt. and; said pivotrboss. and.' asurface banextending above said surface-plateeanlnhaiz:

inventianiwhat:

las

ing its upper edge lying in a plane parallel to said surface plate.

2. In a device of the character described in combination, a supporting block having its upper surface formed to constitute a surface plate, a vertically extending bracket at one corner of said supporting block, said bracket being provided With a slot and having sides lying in vertical parallel surfaces, a pivot boss having one end adapted to rest against one of said parallel surfaces, a pivot bolt extending through said pivot boss and said slot, means to prevent said pivot bolt from rotating in said pivot boss, a clamping nut carried on the outer end of said bolt and being adapted to bear against the other of said parallel surfaces, and a movable sine bar rotatably mounted on the opposite end of said pivot bolt.

3. A device of the character described comprising in combination, a base member, a surface bar carried by said base member,

va bracket supported by said base member,

said bracket being provided With a vertical slot, a sine bar, and means coperating With said bracket for adjustably mounting said sine bar over said surface bar.

4. In a device of the character described in combination, a supporting block being provided on its upper portion with a predetermined measuring surface, a measuring bar being provided with a Work surface, means for pivotally mounting said measuring bar over said predetermined surface,

and a pair of cylindrical buttons mounted on said measuring bar in such manner that a plane including the axes of said buttons is always parallel to the Work surface of said measuring bar.

5. In a device of the class described in combination, a supporting base, means mounted upon said supporting base and being provided on its upper edge with a substantially plane surface to constitute a measuring base, a rotatable measuring arm provided With a Work face, and a pair of cylindrical buttons mounted on said arm in such relation to said arm that the plane including the axes of said buttons is parallel to the Work face of said arm.

6. In a device of the class described in combination, a supporting base being provided on its upper surface with a plane surface, a bar adjacent said plane surface and having an upper surface parallel to said plane surface, a measuring arm mounted to rotate directly above the upper surface on said bar, a pair of cylindrical buttons both of which are fixedly mounted relative to said measuring arm and one of Which rotates With said measuring arm, said cylindrical buttons being of exactly the same diameter and comprising means for determining a predetermined base line.

VILLIAM WINTER.

Witnesses:

ROY J. SOULER, AUSTIN M. WILSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I). C. 

